An expired SSL certificate was the source of a worldwide outage of the Microsoft Azure cloud service. The disruption was discovered on the afternoon of Feb. 22, and service was restored the following day. Non-secured HTTP traffic was not affected. The Azure storage service appeared to be most dramatically impacted, but correspondents in the blogosphere pointed to other services, as well. Some individuals reported that the outage even impacted their XBox streaming capabilities. Failure to renew the SSL certificate is essentially a matter of human error. The incident provoked widespread speculation that the Redmond, Wash.-based company was under cyber-attack.